CN217893155U - Tension leg mooring offshore floating type fan foundation structure and offshore floating type fan system - Google Patents

Abstract

The utility model provides a tension leg mooring offshore floating type fan foundation structure and an offshore floating type fan system, which comprise a floating body, a mooring system and an anchoring system; the floating bodies comprise a central upright post and a plurality of groups of floating barrels which are connected between the central upright post and the outer upright post and are distributed in a star-shaped symmetrical mode, each group of floating barrels is two, the two floating barrels are arranged in an upper layer and a lower layer, one ends, far away from the central upright post, of the floating barrels are connected to the outer upright post, gaps are formed between the upper layer of floating barrels and the lower layer of floating barrels close to the central upright post for water flow to pass through, and the top of the central upright post is used for being connected with a tower barrel of the offshore floating type fan; the floating body is fixed on the seabed through a mooring system and an anchoring system, and the mooring system is always in a tension state. The utility model discloses the float is with the steel volume few, and level and vertical wave current load are less, and platform structure atress is even, and tension tendon atress is less, can increase tension tendon life-span to can reduce the advantage of anchor basic design load and construction installation cost.

Description

Tension leg mooring offshore floating type fan foundation structure and offshore floating type fan system

Technical Field

The utility model relates to a marine floating fan technique especially relates to a tension leg moors marine floating fan foundation structure and marine floating fan system.

Background

With the development of offshore wind power engineering technology, offshore wind power generation gradually shows good economic benefits. The main ocean countries in the world all increase the investment on the offshore wind power industry, and develop a large amount of offshore wind power development. At present, offshore wind farms are developed sufficiently, and deep and far sea wind power development in the future becomes key work for offshore wind power development of all countries. Due to the limitation of engineering technology, the development cost of deep and open sea wind power is still high at present, and the requirement of commercial development cannot be met. Therefore, finding a floating type fan scheme with more optimized cost is a hot research direction of the international offshore wind power industry at present.

At present, a plurality of demonstration application researches of semi-submersible floating wind turbine foundations are carried out all over the world, and demonstration results show that the cost of most semi-submersible platform foundations is higher than 3 ten thousand yuan/kw and is about 2-3 times higher than the commercial development cost. Therefore, to promote the large-scale application of floating wind power, the cost of the prior art needs to be greatly reduced.

SUMMERY OF THE UTILITY MODEL

To current floating fan foundation cost too high problem, the utility model aims to provide a marine floating fan foundation structure of tension leg mooring, this foundation structure have the body with the steel volume less, level and vertical ripples load are less, the platform structure atress is even, tension tendon atress is less, extension tension tendon life-span to can reduce anchor basic design load, and then reduce anchor basic system structure size and build installation cost's advantage.

In order to achieve the purpose, the utility model adopts the technical proposal that: a tension leg moored offshore floating type wind turbine foundation structure comprises a floating body, a mooring system and an anchoring system;

the floating body comprises a central upright post, a plurality of outer upright posts and a plurality of groups of floating barrels which are connected between the central upright post and the outer upright posts and are distributed in a star-shaped symmetrical manner, each group of floating barrels is two (an upper layer of floating barrels and a lower layer of floating barrels), the two floating barrels are arranged in an upper layer and a lower layer, one ends of the floating barrels far away from the central upright posts are connected to the outer upright posts (the outer upright posts can be round upright posts, square columns or polygonal columns), the distance between the upper layer of floating barrels and the lower layer of floating barrels is more than 1 meter, the upper layer of floating barrels and the lower layer of floating barrels are arranged in a non-parallel manner, a larger gap is formed at the position close to the central upright posts so as to allow water flow to pass through, and the top of the central upright posts is used for being connected with a offshore floating fan tower; the buoys arranged in the upper layer and the lower layer can increase the number of the buoys to provide more buoyancy, and can reduce the vertical projection area and reduce the wave load caused by the water quality point and the structure action. In addition, the gap between the upper layer of floating cylinders and the lower layer of floating cylinders can allow water flow to bypass, so that the horizontal load of the water flow on the floating cylinders is reduced;

the bottom end of the upright column at the outer side of the floating body is connected with an anchoring system through a mooring system, namely, the floating body is fixed on the seabed through the mooring system and the anchoring system, and the mooring system is always in a tension state. The tension leg moored offshore floating type wind turbine foundation structure can provide larger buoyancy, and ensures that the system always keeps positive buoyancy under various marine environmental conditions, namely the mooring system is always in a pulled state, so that the foundation function of the tension leg floating type wind turbine is realized.

Further, the floating body comprises 3-8 groups of buoys, preferably 3-5 groups of buoys. The plurality of groups of buoys are symmetrically arranged around the center of the central upright post.

Further, the cross section of the buoy is circular, square or polygonal. Specifically determined by the construction, installation and operational requirements.

Further, the structural form of the pontoon is a ribbed plate shell form.

Further, the sections of the buoys are kept in a uniform shape or gradually change along the axial direction, the buoys can be kept in a uniform section or the radius of the radial section of the side far away from the central upright post is smaller, and the radius of the radial section of the side close to the central upright post is larger, so that the buoys can bear the action of larger bending moment at the center.

Further, the lower layer buoys can be arranged horizontally or inclined downwards (the inclination angle is 0-30 degrees), and the upper layer buoys can be arranged horizontally or inclined upwards (the inclination angle is 0-30 degrees). The inclination angle is made according to the requirements of manufacturing, installation and in-place working condition.

Further, the pontoon material is steel, concrete or other composite material that meets strength, corrosion requirements, including but not limited to fiberglass reinforcement. The utility model discloses an optimize the shape, reduce the volume and realize reducing the steel volume.

Further, the mooring system is a tendon. The tension tendons are kept in a tension state in the life cycle, the tension force is kept at a high level, and the integral instability caused by the movement of the fan and the foundation is avoided.

Further, each outer upright post is connected with 2-3 tension tendons.

Furthermore, the tension tendon is a steel pipe, an anchor chain, a steel cable or a composite fiber material.

Further, the tendons may be perpendicular to the sea bed or slightly inclined.

Further, the anchoring system is a suction bucket foundation, a pile foundation or a gravity foundation.

Furthermore, a flange plate is reserved at the top of the central upright column so as to be connected with the offshore floating type wind turbine tower.

The utility model discloses a still disclose a marine floating fan system, moor marine floating fan foundation structure, a tower section of thick bamboo and fan including above-mentioned tension leg, the fan is installed in a tower section of thick bamboo upper end, the top at center pillar is connected to a tower section of thick bamboo lower extreme. The offshore floating type fan system adopts a double-layer floating drum form, the wave load is not increased while the buoyancy is improved, meanwhile, the double-layer floating drum provides larger structural strength, the internal stress level of node steel is reduced, and the structural safety is improved.

Installation of the offshore floating wind turbine system: 1) The utility model discloses tension leg form floating fan platform carries out the integration of tension leg offshore floating fan foundation structure, a tower section of thick bamboo and fan unit and blade of mooring at bank's wharf. 2) And (4) carrying out the installation of an anchoring system and a tensioning mooring system in advance at the position of the fan. The installed taut mooring system may be temporarily placed on the sea floor or placed in tension in the water with a temporary buoy. 3) The integrated floating fan system is transported to a fan position by a transportation auxiliary floating body or a barge for installation in place. 4) After the floating wind turbine arrives at the aircraft site, the ballasting down draft is connected to the taut mooring system. And after the connection is finished, discharging ballast water to enable the floating body to float upwards, and tensioning the mooring system to finish the in-place installation of the floating body.

The utility model discloses tension leg mooring offshore floating type fan foundation structure and offshore floating type fan system compares with prior art and has following advantage:

1) The utility model discloses tension leg floating fan basis concept form has considered the atress characteristics on tension leg floating basis, and two-layer flotation pontoon structure about adopting increases the whole buoyancy of structure on the one hand, and on the other hand reduces vertical projection area, reaches the purpose that reduces vertical wave, ocean current load, and then reduces the alternating load amplitude of tension tendon, improves the fatigue life of tension tendon. In addition, a horizontal gap is reserved between the buoys arranged in the upper layer and the lower layer, water can flow around and pass through the gaps, and the purpose of reducing the wave flow load of the platform in the horizontal direction is achieved. Thereby reducing the platform motion and the stress of the tension tendon.

3) A floating foundation in the form of a tension leg may have a larger cost optimization space than a semi-submersible floating wind turbine. Compared with a semi-submersible type fan, the tension leg floating type fan has a plurality of advantages, firstly, the tension leg floating type foundation size is smaller, the steel consumption is smaller than that of the semi-submersible type floating type fan, and the steel consumption can be generally reduced by about 30%. The length of the tension leg floating type fan mooring system is smaller, which can reach 1/5-1/10 of the catenary mooring system, and the cost is lower than that of the catenary mooring system of the semi-submersible fan. And thirdly, the floating foundation of the tension leg has excellent motion performance, and the swing motion and the swaying motion of the platform can reach 1/10 order of magnitude of the semi-submersible foundation, so that the floating foundation is friendly to an upper unit, the reliability of the fan unit can be obviously improved, and the unit cost is further reduced. Fourthly, the tension leg base is beneficial to the design of the dynamic submarine cable, because the dynamic floating body moves less, the linear design of the dynamic submarine cable is easy, and the fatigue damage of the dynamic submarine cable can be obviously reduced.

4) The utility model discloses a tension leg form floating fan basis compares with other floating foundations, under the limited condition with the steel volume, can provide more buoyancy. The use efficiency of steel is improved, and the cost of the floating foundation is reduced.

5) The utility model provides a floating foundation form can provide more buoyancy, and does not increase the vertical atress of body, reduces tension tendon atress and anchoring system atress, and then reduces tensioning mooring, anchoring system cost.

6) The utility model provides a tension tendon mooring system, make full use of material self tensile properties provides the rigidity of mooring, compares with catenary mooring mode, and its mooring system length reduces by a wide margin, and mooring system accessory quantity requires still less, and the cost of mooring reduces by a wide margin.

7) The utility model provides a body form has higher bending stiffness, and structural force-carrying capacity is more reasonable, and hot stress level has great improvement, and the structure is used safelyr.

Drawings

Fig. 1 is a schematic structural diagram of an offshore floating wind turbine system according to embodiment 1;

FIG. 2 is a schematic structural diagram of a tension leg moored offshore floating wind turbine foundation structure in the embodiment 1;

FIG. 3 is a schematic structural diagram of an offshore floating wind turbine system according to embodiment 2;

FIG. 4 is a schematic structural diagram of an offshore floating wind turbine infrastructure moored by tension legs according to embodiment 2;

FIG. 5 is a schematic structural diagram of an offshore floating wind turbine system according to embodiment 3;

FIG. 6 is a schematic structural diagram of an embodiment 3 of a tension leg moored offshore floating wind turbine foundation structure;

FIG. 7 is a schematic structural diagram of an offshore floating wind turbine system according to embodiment 4;

FIG. 8 is a schematic structural diagram of an embodiment 4 of a tension leg moored offshore floating wind turbine infrastructure.

Detailed Description

The invention is further illustrated below with reference to the following examples:

example 1

The embodiment discloses a tension leg moored offshore floating wind turbine foundation structure as shown in fig. 1 and fig. 2, which comprises a floating body 3, a mooring system 4 and an anchoring system 5;

the floating body 3 comprises a cylindrical center upright post 6, an outer side upright post and 3 groups of buoys which are connected between the center upright post and the outer side upright post and are distributed in star symmetry, and the 3 groups of buoys are arranged around the center of the center upright post 6 in a central symmetry manner. Every float of group is two, is upper buoy 8 and lower floor's buoy 9 respectively, and two-layer arrangement about two buoys are, lower floor's buoy 9 level is arranged, and the one end downward sloping of central pillar 6 is kept away from to upper buoy 8. The upper layer of buoys 8 and the lower layer of buoys 9 have a distance of more than 1 meter at one end close to the central upright post 6, and the distance between the upper layer of buoys 8 and the lower layer of buoys 9 at one end far away from the central upright post 6 is smaller. The inclination angle of the upper layer buoy 8 is made according to the requirements of manufacturing, installation and in-place working condition. A gap is formed between the upper and lower layers of floating cylinders at a position close to the central upright post for water flow to pass through, so that the horizontal load of the water flow acting on the floating cylinders is reduced.

The one end that the center pillar was kept away from to the flotation pontoon is connected on outside stand 7, outside stand 7 is the cylinder the same with the flotation pontoon profile, the flotation pontoon cross-section is square, and outside stand 7 is the square the same with the flotation pontoon cross-section. The flotation pontoon cross-section is the gradual change, the flotation pontoon is kept away from that 6 one side radial cross-section radiuses of center pillar are less, is close to that one side radial cross-section radius of center pillar is great to bear the great moment of flexure effect of center department. The structure form of the buoy is a ribbed plate shell form. The buoy is made of glass fiber reinforced material. The upper and lower two-layer arrangement's flotation pontoon increases the flotation pontoon quantity on the one hand and can provide more buoyancy, and on the other hand can reduce vertical projection area, reduces the wave load that quality of water point and structure effect arouse.

The bottom end of the upright post 7 at the outer side of the floating body 3 is connected with the anchoring system 5 through the mooring system 4, namely, the floating body 3 is fixed on the seabed through the mooring system 4 and the anchoring system 5, and the mooring system 4 is always in a tension state. In this embodiment, the mooring system 4 is a tension tendon, and the tension tendon is kept in a tensioned state in a life cycle and kept at a high level, so that overall instability caused by movement of the fan and the foundation is avoided. In this embodiment, each outer upright post 7 is connected with 2 tension tendons, each tension tendon is an anchor chain, and each tension tendon is perpendicular to the seabed. The anchoring system is a pile foundation.

The foundation structure of the offshore floating type wind turbine moored by the tension legs can provide larger buoyancy, the system is ensured to keep positive buoyancy all the time under various marine environment conditions, and the mooring system is always in a pulled state, so that the foundation function of the floating type wind turbine with the tension legs is realized.

The embodiment also discloses an offshore floating wind turbine system, as shown in fig. 1, the offshore floating wind turbine system comprises the offshore floating wind turbine foundation structure moored by the tension legs, a tower drum 2 and a wind turbine 1, the wind turbine 1 is installed at the upper end of the tower drum 2, and the lower end of the tower drum 2 is connected to the top of the central upright post 6 through a flange. The floating fan in the form of the tension leg adopts the form of a double-layer buoy, so that the buoyancy is improved, the wave load is not increased, meanwhile, the double-layer buoy provides greater structural strength, the internal stress level of node steel is reduced, and the structural safety is improved.

The utility model discloses installation of marine floating fan system: and the integration of a floating body, a tower drum, a fan unit and blades is carried out at a wharf on the bank. And (4) pre-installing an anchoring system and a tensioning mooring system at a fan position. The installed taut mooring system may be temporarily placed on the sea floor or placed in tension in the water with a temporary buoy. The integrated floating fan system is transported to a fan position by a transportation auxiliary floating body or a barge for installation in place. After the floating wind turbine arrives at the site, the ballasting lower draft is connected to a taut mooring system. After the connection is completed, the ballast water is discharged to float the floating body, and the mooring system is tensioned. And finishing the in-place installation of the floating body.

Example 2

The embodiment discloses a tension leg moored offshore floating wind turbine foundation structure as shown in fig. 3 and 4, which comprises a floating body 3, a mooring system 4 and an anchoring system 5;

the floating body 3 comprises a central upright post 6 and 4 groups of floating bowls which are connected to the side wall of the central upright post and are distributed in star symmetry. The 4 groups of buoys are arranged symmetrically around the center of the center column 6. Every group flotation pontoon is two, is upper strata flotation pontoon 8 and lower floor flotation pontoon 9 respectively, and two-layer arrangement about two flotation pontoons are, the one end that the center stand was kept away from to the flotation pontoon is connected on outside stand 7, the outside stand is the cylinder the same with the flotation pontoon profile, the flotation pontoon cross-section is square.

The structure form of the buoy is a ribbed plate shell form. The radial cross section of the buoy remains uniform. The lower layer of floating cylinders 9 are horizontally arranged, and one ends of the upper layer of floating cylinders 8, which are far away from the central upright post 6, are inclined downwards. The inclination angle is set according to the requirements of manufacturing, installation and in-place working conditions. The buoy is made of concrete. A gap is formed between the upper and lower layers of floating cylinders at a position close to the central upright post for water flow to pass through, so that the horizontal load of the water flow acting on the floating cylinders is reduced. The top of the central upright post is used for connecting an offshore floating type fan tower; the buoys arranged in the upper layer and the lower layer can increase the number of the buoys to provide more buoyancy, and can reduce the vertical projection area and reduce the wave load caused by the water quality point and the structure action. The bottom end of the upright column at the outer side of the floating body 3 is connected with an anchoring system 5 through a mooring system 4, namely, the floating body 3 is fixed on the seabed through the mooring system 4 and the anchoring system 5, and the mooring system is always in a tension state. The mooring system 4 is a tendon. The tension tendon keeps a tension state in a life cycle, and keeps the tension at a higher level, so that the integral instability caused by the movement of the fan and the foundation is avoided. Each outer upright post 7 is connected with 2 tension tendons. The tension tendon is a steel pipe. The included angle between the tension tendon and the seabed is slightly smaller than 90 degrees. The anchoring system is a gravity foundation.

The foundation structure of the offshore floating type wind turbine moored by the tension legs can provide larger buoyancy, the system is ensured to keep positive buoyancy all the time under various marine environment conditions, and the mooring system is always in a pulled state, so that the foundation function of the floating type wind turbine with the tension legs is realized.

The embodiment also discloses an offshore floating wind turbine system, as shown in fig. 4, the offshore floating wind turbine system comprises the tension leg mooring offshore floating wind turbine foundation structure, a tower drum 2 and a wind turbine 1, wherein the wind turbine 1 is installed at the upper end of the tower drum, and the lower end of the tower drum is connected to the top of the central upright post through a flange. The floating fan in the form of the tension leg adopts the form of a double-layer buoy, so that the buoyancy is improved, the wave load is not increased, meanwhile, the double-layer buoy provides greater structural strength, the internal stress level of node steel is reduced, and the structural safety is improved.

The utility model discloses installation of marine floating fan system: and (4) integrating a floating body, a tower drum, a fan unit and blades at a quayside wharf. And (4) pre-installing an anchoring system and a tensioning mooring system at a fan position. The installed taut mooring system may be temporarily placed on the sea floor or placed in tension in the water with a temporary buoy. The integrated floating fan system is transported to a fan position by a transportation auxiliary floating body or a barge for installation in place. After the floating wind turbine arrives at the aircraft site, the ballasting down draft is connected to the taut mooring system. After the connection is completed, the ballast water is discharged to float the floating body, and the mooring system is tensioned. And finishing the in-place installation of the floating body.

Example 3

The embodiment discloses a tension leg moored offshore floating wind turbine foundation structure which is shown in fig. 5 and 6 and comprises a floating body 3, a mooring system 4 and an anchoring system 5;

the floating body 3 comprises a central upright post 6 and 3 groups of floating barrels which are connected to the side wall of the central upright post and are distributed in star symmetry. The 3 groups of buoys are arranged symmetrically around the center of the center column 6. Every group flotation pontoon is two, is upper strata flotation pontoon 8 and lower floor flotation pontoon 9 respectively, and two-layer arrangement about two flotation pontoons are, the one end that the center pillar was kept away from to the flotation pontoon is connected on outside stand 7, the outside stand is circular stand, the flotation pontoon cross-section is circular. The structural form of the floating barrel is a ribbed plate shell form. The radial cross section of the buoy changes gradually, the radius of the radial cross section of one side of the buoy, which is far away from the central upright post, is smaller, and the radius of the radial cross section of one side of the buoy, which is close to the central upright post, is larger, so that the effect of a larger bending moment of the center is borne. The lower layer of floating cylinders 9 are horizontally arranged, and one ends of the upper layer of floating cylinders 8, which are far away from the central upright post 6, are inclined downwards. The inclination angle is set according to the requirements of manufacturing, installation and in-place working conditions. The buoy is made of concrete. A gap is formed between the upper layer of floating cylinder and the lower layer of floating cylinder at the position close to the central upright post for water flow to pass through, so that the horizontal load of the water flow acting on the floating cylinders is reduced. The top of the central upright post is used for connecting an offshore floating type fan tower; the buoys arranged in the upper layer and the lower layer can increase the number of the buoys to provide more buoyancy, and can reduce the vertical projection area and reduce the wave load caused by the water quality point and the structure action.

The bottom end of the upright column at the outer side of the floating body 3 is connected with an anchoring system 5 through a mooring system 4, namely, the floating body 3 is fixed on the seabed through the mooring system 4 and the anchoring system 5, and the mooring system is always in a tension state. The mooring system 4 is a tendon. The tension tendon keeps a tension state in a life cycle, and keeps the tension at a higher level, so that the integral instability caused by the movement of the fan and the foundation is avoided. Each outer upright post 7 is connected with 3 tension tendons which are steel cables. The tendons are perpendicular to the sea bed. The anchoring system is a suction bucket foundation.

The foundation structure of the offshore floating type fan moored by the tension legs can provide larger buoyancy, the system is ensured to keep positive buoyancy all the time under various marine environment conditions, and the mooring system is always in a pulled state, so that the foundation function of the offshore floating type fan with the tension legs is realized.

The embodiment also discloses an offshore floating wind turbine system, as shown in fig. 5, the offshore floating wind turbine system comprises the tension leg mooring offshore floating wind turbine foundation structure, a tower drum 2 and a wind turbine 1, wherein the wind turbine 1 is installed at the upper end of the tower drum, and the lower end of the tower drum is connected to the top of the central upright post through a flange. The floating fan in the form of the tension leg adopts the form of a double-layer buoy, so that the buoyancy is improved, the wave load is not increased, meanwhile, the double-layer buoy provides greater structural strength, the internal stress level of node steel is reduced, and the structural safety is improved.

The utility model discloses installation of marine floating fan system: and the integration of a floating body, a tower drum, a fan unit and blades is carried out at a wharf on the bank. And (4) carrying out the installation of an anchoring system and a tensioning mooring system in advance at the position of the fan. The installed taut mooring system may be temporarily placed on the sea floor or placed in tension in the water with a temporary buoy. The integrated floating fan system is transported to a fan position by a transportation auxiliary floating body or a barge for installation in place. After the floating wind turbine arrives at the site, the ballasting lower draft is connected to a taut mooring system. After the connection is completed, the ballast water is discharged to float the floating body, and the mooring system is tensioned. And finishing the in-place installation of the floating body.

Example 4

The embodiment discloses a tension leg moored offshore floating wind turbine foundation structure which is shown in figures 7 and 8 and comprises a floating body 3, a mooring system 4 and an anchoring system 5;

the floating body 3 comprises a central upright post 6 and 4 groups of floating bowls which are connected to the side wall of the central upright post and are distributed in star symmetry. The 4 groups of buoys are arranged symmetrically around the center of the center column 6. Every group flotation pontoon is two, is upper strata flotation pontoon 8 and lower floor flotation pontoon 9 respectively, and two-layer arrangement about two flotation pontoons are, the one end that the center pillar was kept away from to the flotation pontoon is connected on outside stand 7, the outside stand is circular stand, the flotation pontoon cross-section is circular. The structure form of the buoy is a ribbed plate shell form. The radial cross-section of the pontoon remains uniform. The lower-layer floating barrels 9 are horizontally arranged, and one ends, far away from the central upright post 6, of the upper-layer floating barrels 8 are inclined downwards. The inclination angle is made according to the requirements of manufacturing, installation and in-place working condition. The buoy is made of glass fiber reinforced material. A gap is formed between the upper layer of floating drum and the lower layer of floating drum at a position close to the central upright column for water flow to pass through, so that the horizontal load of the water flow acting on the floating drums is reduced; the top of the central upright post is used for connecting an offshore floating type fan tower; the upper and lower two-layer arrangement's flotation pontoon increases the flotation pontoon quantity on the one hand and can provide more buoyancy, and on the other hand can reduce vertical projection area, reduces the wave load that quality of water point and structure effect arouse.

The bottom end of the upright column at the outer side of the floating body 3 is connected with an anchoring system 5 through a mooring system 4, namely, the floating body 3 is fixed on the seabed through the mooring system 4 and the anchoring system 5, and the mooring system is always in a tension state. The mooring system 4 is a tendon. The tension tendon keeps a tension state in a life cycle, and keeps the tension at a higher level, so that the integral instability caused by the movement of the fan and the foundation is avoided. Each outer upright post 7 is connected with 2 tension tendons which are made of composite fiber materials and are perpendicular to the seabed. The anchoring system is a suction bucket foundation.

The foundation structure of the offshore floating type fan moored by the tension legs can provide larger buoyancy, the system is ensured to keep positive buoyancy all the time under various marine environment conditions, and the mooring system is always in a pulled state, so that the foundation function of the offshore floating type fan with the tension legs is realized.

The embodiment also discloses an offshore floating wind turbine system, as shown in fig. 7, the offshore floating wind turbine system comprises the offshore floating wind turbine foundation structure moored by the tension legs, a tower drum 2 and a wind turbine 1, wherein the wind turbine 1 is installed at the upper end of the tower drum, and the lower end of the tower drum is connected to the top of the central upright post through a flange. The floating fan in the form of the tension leg adopts the form of a double-layer buoy, so that the buoyancy is improved, the wave load is not increased, meanwhile, the double-layer buoy provides greater structural strength, the internal stress level of node steel is reduced, and the structural safety is improved.

The utility model discloses installation of marine floating fan system: and the integration of a floating body, a tower drum, a fan unit and blades is carried out at a wharf on the bank. And (4) carrying out the installation of an anchoring system and a tensioning mooring system in advance at the position of the fan. The installed taut mooring system may be temporarily placed on the sea floor or placed in tension in the water with a temporary buoy. The integrated floating fan system is transported to a fan position by a transportation auxiliary floating body or a barge for installation in place. After the floating wind turbine arrives at the site, the ballasting lower draft is connected to a taut mooring system. After the connection is completed, the ballast water is discharged to float the floating body, and the mooring system is tensioned. And finishing the in-place installation of the floating body.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (10)

1. A tension leg moored offshore floating type wind turbine foundation structure is characterized by comprising a floating body (3), a mooring system (4) and an anchoring system (5);

the floating body (3) comprises a central upright post (6), a plurality of outer side upright posts and a plurality of groups of floating barrels which are connected between the central upright post and the outer side upright posts and are distributed in a star-shaped symmetrical manner, each group of floating barrels is two, the two floating barrels are arranged in an upper layer and a lower layer, one end of each floating barrel, which is far away from the central upright post, is connected to the outer side upright post (7), and a gap is formed between the upper layer floating barrel and the lower layer floating barrel at a position close to the central upright post;

the bottom end of the upright post at the outer side of the floating body (3) is connected with an anchoring system (5) through a mooring system (4), and the mooring system (4) is always in a tension state.

2. Tension leg moored offshore floating wind turbine infrastructure according to claim 1, characterized in that the buoy (3) comprises 3-8 groups of buoys.

3. The tension leg moored offshore floating wind turbine infrastructure of claim 1, wherein said buoy radial cross section is circular, square or polygonal.

4. The tension leg moored offshore floating wind turbine infrastructure of claim 1, wherein the pontoon cross-section remains uniform or gradually changes in axial direction, and the pontoon can remain uniform in cross-section or have a smaller radial cross-section radius on the side away from the center column and a larger radial cross-section radius on the side close to the center column.

5. Tension leg moored offshore floating wind turbine infrastructure according to claim 1, characterized in that the lower buoy (9) is arranged horizontally or inclined downwards and the upper buoy (8) is arranged horizontally or inclined upwards.

6. The tension leg moored offshore floating wind turbine infrastructure of claim 1, wherein the buoy material is steel, concrete or fiberglass reinforced material.

7. Tension leg moored offshore floating wind turbine infrastructure according to claim 1, characterized in that the mooring system (4) is a tension tendon.

8. The tension leg moored offshore floating wind turbine infrastructure of claim 7, wherein said tension tendons are steel pipes, anchor chains, steel cables, or composite fiber materials.

9. Tension leg moored offshore floating wind turbine infrastructure according to claim 7, characterized in that the tension tendons can be perpendicular to the sea bed or slightly inclined.

10. Offshore floating wind turbine system, comprising a tension leg moored offshore floating wind turbine infrastructure, a tower (2) and a wind turbine (1) according to any of claims 1-9, wherein the wind turbine (1) is mounted at the upper end of the tower (2), and the lower end of the tower (2) is connected to the top of a central column (6).

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